Why Do Cars Burn Engine Oil?

[VanKennedy]

Cars burn engine oil due to natural wear and tear, dirty oil, etc. The specific reasons are as follows: Natural Wear and Tear: As the car's mileage increases, the wear between the piston and cylinder gradually intensifies. When this wear reaches a certain level, cylinder blow-by occurs, leading to oil burning. If the valve stem seals are damaged, the oil burning phenomenon becomes more pronounced. Dirty Oil: Dirty oil contains impurities that accelerate engine cylinder wear, resulting in oil burning. Additionally, using counterfeit oil or oil that does not meet the vehicle's specified grade prevents the formation of a proper oil film on the engine's friction surfaces. Severe cases may cause cylinder scoring, while milder cases lead to blow-by, both contributing to oil burning.